. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. Q. R. S. Figs. Pa, Pb, Pc.— Successive sections of spermatocyte of Arphia tenebrosa during the early anaphase of the first division. All the chromosomes are shown. In Fig. Pb are two monosomes, neither of which is dividing, x 966. Fig. Q.— Polar view, metaphase of second maturation division of Dissosteira Carolina. The monosome is present, as the total number of chromosomes (12) indicates. X 966. Fig. R.— Polar view, metaphase of second maturation division of Dissosteira Carolina. The monosome is lacking as t
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. Q. R. S. Figs. Pa, Pb, Pc.— Successive sections of spermatocyte of Arphia tenebrosa during the early anaphase of the first division. All the chromosomes are shown. In Fig. Pb are two monosomes, neither of which is dividing, x 966. Fig. Q.— Polar view, metaphase of second maturation division of Dissosteira Carolina. The monosome is present, as the total number of chromosomes (12) indicates. X 966. Fig. R.— Polar view, metaphase of second maturation division of Dissosteira Carolina. The monosome is lacking as there are only eleven chromosomes. X 966. Fig. aS.— Polar view, metaphase of second maturation division of Arphia tene- brosa. Two monosomes are present. X 966. nuclear membrane (Plate 4, Figs. 57, 58; Plate 7, Figs. 108, 109). During the prophase of the first maturation division the arms of the U shorten and become apposed to each other, so that the monosome appears as a longitudinally split rod (Figs. 110, 111). During the-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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